/Engine/Source/Runtime/MediaUtils/Public/MediaSampleCache.h
GetOverlaySamples
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IMediaAudioSample](API\Runtime\Media\IMediaAudioSample), ESPMode::ThreadSafe > GetAudioSample ( [FTimespan](API\Runtime\Core\Misc\FTimespan) Time )